Highways that cross each other, but don't intersect

[golden eagle]

US 80 and I-55 in Jackson do not intersect with each other. That's understandable since I-20 is just a stone's throw away from 80. There are also two interstates in Ohio that don't intersect with each other (80 and 271). What's the story behind that one?

[Quillz]

CA-210 (future I-210) and CA-83 cross but do not intersect due to successful NIMBY action in the area. However, it really doesn't matter because Mountain Avenue, which carries a short portion of CA-66, is about a mile away and does intersect with the freeway.

[3467]

US 34 and I-80 in Illinois though there are many signs and other acess points very close.
There are  posts on the non intersecting Interstates like I-294 and I-57 I think but I will mention it.

[hbelkins]

US 80 and I-55 in Jackson do not intersect with each other. That's understandable since I-20 is just a stone's throw away from 80. There are also two interstates in Ohio that don't intersect with each other (80 and 271). What's the story behind that one?

Because I-80 is the Ohio Turnpike. There's another thread that deals with this phenomenon somewhere. It happens frequently with toll roads -- see I-475 and the Ohio Turnpike, and I-81 and the Pennsylvania Turnpike.

[ftballfan]

In Michigan:
I-75 and M-1, Detroit
I-75 and M-48, Rudyard (M-48 crosses over I-75, turns north on old US-2, and then turns back east to end at I-75)
I-75 and M-72, Grayling
I-75 and M-85 (northernmost), Detroit
I-94 and M-1, Detroit
I-196 and M-43, South Haven
I-375 and M-3, Detroit
I-675 and M-13, Saginaw
US-131 and M-45, Grand Rapids (used to, until M-45 was truncated to I-196)
M-10 and M-85, Detroit

[InterstateNG]

I-375 and M-3:

http://maps.google.com/maps?q=Detroit,+MI&hl=en&ll=42.339736,-83.040698&spn=0.008137,0.01929&sll=46.203478,-84.551811&sspn=0.060354,0.154324&z=16&layer=c&cbll=42.339889,-83.040917&panoid=x8nci3I52AO_IBs3a97zKA&cbp=12,343.34,,0,0

I-94 and M-1: http://maps.google.com/maps?q=Detroit,+MI&hl=en&ll=42.362429,-83.070953&spn=0.008134,0.01929&sll=46.203478,-84.551811&sspn=0.060354,0.154324&z=16&layer=c&cbll=42.362498,-83.070836&panoid=taTu9S6hY2AiKSjFtnmMqQ&cbp=12,81.59,,0,0

And I believe the OP means interchanges.  An intersection is an at grade crossing.

[NE2]

FDR Drive and the Queensboro Bridge. Why couldn't they have installed elevators for a direct connection?

[OracleUsr]

I-77 at US 64 in Statesville, NC...not surprising since you can go north to I-40 and the very next exit is US 64...a distance of less than two miles.

[TheStranger]

The most obvious Northern California example is I-880 at Route 87 near San Jose International Airport (where geography and existing infrastructure for the VTA light rail system make such a connection difficult).

[vtk]

I-270 passes over OH 257 and OH 745 (plus the Scioto River) with one bridge, and no interchange.  On the other side of town, I-270 passes under OH 104 without an interchange.

Also notable is I-71 & US 35, which uses OH 435 as a connecting road.

Actually, I could go on and on about freeways or expressways that cross other state-maintained roads in Ohio without intersections or interchanges.  The situation exists in more places than one might expect.

[SSOWorld]

FDR Drive and the Queensboro Bridge. Why couldn't they have installed elevators for a direct connection?

What about the Manhattan and Williamsburg bridges?  The Queens-Midtown Tunnel?  It does have a direct connection to the Brooklyn and RFK (Triboro).  Interesting how the BQE has connections to the Manhattan and Tunnel but the FDR doesn't.

I-57 and the Tri-State (I-294) in IL.  Of course the ISTHA and IDiOT hope to change that.

WIS 29 and I-43 cross just north of WIS 172 in Green Bay, but indirect access is about 5 miles south at the US-141 terminus.  Indirect meaning you have to take about 1/4 mile of US-141 before you see it.

WIS 11 and US 12 don't intersect directly, but do cross.  You can either take local streets in Elkhorn or go to I-43 or CTH-NN.

[Coelacanth]

MN-55 crosses both I-35E and I-494 but does not have a direct interchange with either.

I suspect this is due to the fact that the two interstates intersect each other with a major cloverleaf, and adding connections to MN-55 would be a logistical nightmare.

[huskeroadgeek]

I-180 and US 6 cross each other, but don't directly intersect-but there is an interchange on I-180 just north of the meeting point which is just a few blocks west of US 6. In Missouri, US 59 crosses I-29 once without an interchange, but the two roads meet again just a couple of miles south at Exit 92. Also on I-29 in Missouri, MO 116 crosses I-29 without an interchange, but there are interchanges a couple of miles north and south with supplemental(lettered) routes. US 34 and I-80 in Illinois was mentioned above-there are a few other cases in Illinois as well where parallel routes cross an interstate without a direct interchange: US 6 crosses I-74/I-280 without an interchange, but there is one on I-80 just east, US 6 also crosses I-80 without an interchange between Exits 27 and 33, but those interchanges are very close to US 6 and are only a few miles away, and I-74 crosses US 150 near Farmer City without an interchange, but there is one at IL 54 nearby.

[mgk920]

FDR Drive and the Queensboro Bridge. Why couldn't they have installed elevators for a direct connection?

What about the Manhattan and Williamsburg bridges?  The Queens-Midtown Tunnel?  It does have a direct connection to the Brooklyn and RFK (Triboro).  Interesting how the BQE has connections to the Manhattan and Tunnel but the FDR doesn't.

I-57 and the Tri-State (I-294) in IL.  Of course the ISTHA and IDiOT hope to change that.

WIS 29 and I-43 cross just north of WIS 172 in Green Bay, but indirect access is about 5 miles south at the US-141 terminus.  Indirect meaning you have to take about 1/4 mile of US-141 before you see it.

WIS 11 and US 12 don't intersect directly, but do cross.  You can either take local streets in Elkhorn or go to I-43 or CTH-NN.

-WI 441 (freeway) crosses WI 96 (Wisconsin Ave) without connecting in Appleton, WI.

For freeways/tollways that I have not seen mentioned yet,

-I-75/US 30 (Beaverdam, OH)
-I-80 (Ohio Turnpike)/I-271 (near Cleveland, OH)

Mike

[Lightning Strike]

To the OP as to I-80 and I-271, I used to take that route every 3 months or so to get back and forth from college to my home state of NJ; I believe if my memory serves me correct I-80 passes over the Cayuga Valley and that's a high elevation there near that overpass. Might not be feasible to put an interchange there. Not 100% sure though if that's the real reason.
Post Merge: August 15, 2011, 07:59:08 PM
The interchange I can't seem to understand is Pennsylvania Turnpike & I-70 in Breezewood, PA

[pianocello]

US 34 and I-80 in Illinois though there are many signs and other acess points very close.

Where can one find said signs? I don't recall seeing any as of last month.

Also, US-6 in Coralville, IA passes underneath both I-80 and I-380, but exit 240 on 80 says "TO US-6"

[mgk920]

To the OP as to I-80 and I-271, I used to take that route every 3 months or so to get back and forth from college to my home state of NJ; I believe if my memory serves me correct I-80 passes over the Cayuga Valley and that's a high elevation there near that overpass. Might not be feasible to put an interchange there. Not 100% sure though if that's the real reason.
Post Merge: December 31, 1969, 07:59:59 PM
The interchange I can't seem to understand is Pennsylvania Turnpike & I-70 in Breezewood, PA

Just east of the Cuyahoga Valley, OH 8 is now a full freeway and provides a good connection between the two for traffic between I-80 and I-271 to the north and I-77 west of the valley also provides a good connection between I-80 and I-271 to the southwest, so a direct I-80/271 connection is not really needed.  It is interesting, though, that I-271 crosses between the two sides of I-80 in an 'over/under' configuration.

Mike

[hbelkins]

How about US 20 and US 52/61/151 in Dubuque, Iowa? You have to use connecting routes to go between the two highways.

[roadfro]

The interchange I can't seem to understand is Pennsylvania Turnpike & I-70 in Breezewood, PA

That's the one "interchange" that practically every roadgeek can't understand... 

[Chicagosuburban]

Florida's Turnpike crosses I-95 twice, both times without an interchange

[ftballfan]

Florida's Turnpike and the Central Florida Greenway don't interchange and it does not look like there is enough room for an interchange there.

[Ian]

Here are the ones I am aware of...
CT 15 and CT 40, Hamden, CT
I-90/Massachusetts Turnpike and I-391, Chicopee, MA
I-87/New York Thruway and US 44, New Paltz, NY

[NE2]

Florida's Turnpike and the Central Florida Greenway don't interchange and it does not look like there is enough room for an interchange there.

There is enough room and an interchange is planned.

[DAL764]

Florida's Turnpike and the Central Florida Greenway don't interchange and it does not look like there is enough room for an interchange there.

There is enough room and an interchange is planned.

Matter of fact if you look at it in Google Earth/Maps, you can clearly tell where the ramps are supposed to start on the Greeneway, as well as the rough ROW for the Turnpike SB to Greeneway EB and Greeneway EB to Turnpike SB ramps.

Of course, that interchange has been planned since the Greeneway was build, but I'm not sure it will ever be build, no matter how much sense it would make.

[msubulldog]

For years there was no intersection between I-410 and US 281 (McAllister Freeway) on the north side of San Antonio near San Antonio International Airport.